As you may know the 2006 Asia-Pacific Microwave Conference has been held successfully in Yokohama with more than 6000 participants and a total of 694 papers from 42 countries. Then this special section was planned to cover and publish the advanced and latest achievements in microwave and millimeter-wave technologies mainly presented at APMC2007. The growth of wireless communication systems is very fast and a variety of new services have been widely and quickly spread all over the world. These systems and services need inevitably advanced RF technologies especially for versatile, compact and low power consumption RF devices. Therefore this special issue covers the latest results in the field. The editorial committee has selected 22 papers for publication out of 46 submissions from 5 countries. The selected papers cover original research results relating to synthesizers, VCO's, power amplifiers, filters, antenna, mixers, RF circuits and fields simulation techniques, measurement techniques and several wireless communication systems as well as radar systems.
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